Galvão, C.E.S. et al. 1994. Oral rehydration therapy for acute diarrhoea in a region of northeastern Brazil, 1986-1989 . Revista de Saúde Pública. 28, 6 (Dec. 1994), 416–422. DOI:https://doi.org/10.1590/S0034-89101994000600005.